NASCAR ended the session an hour early so that workers could repair two fence sections that had holes in them from damage by Kligerman's car. A second practice session scheduled for 6:30 p.m. was moved up to 6:15 and ran until 8 without incident.

None of the seven drivers involved in the crash were injured, and track officials said no fans were hurt when Kligerman's car hit, ripping out fencing as it slid on its roof along the top of the outside wall.

A Daytona International Speedway official said the fence performed as it was designed to do. A cable and some mesh fencing was replaced. No fans were injured. There weren't many fans in the stands Wednesday because it was a practice day.

The accident comes almost a year after Kyle Larson's car went airborne into the frontstretch catchfence on Feb. 23, 2013, sending a tire and debris into the grandstands and injuring two dozen fans during the Nationwide Series race here.

Matt Kenseth, Joey Logano, Paul Menard, Dave Blaney, Ryan Truex, Trevor Bayne and Kligerman were involved in Wednesday's incident, and the cars of Logano, Menard, Blaney, Truex and Kligerman were heavily damaged, forcing the teams to backup cars for Thursday night's Budweiser Duel (7 p.m. ET, Fox Sports 1). They will have to start from the back in the twin 150-mile qualifying races for Sunday's Daytona 500.

Kligerman, whose car landed on its roof on top of Menard's car, blamed the crash on Logano.

"It looks like the 22 (Logano) was just being overly aggressive," Kligerman said after watching a replay of the crash. "I want to talk to him about it. What are you doing? Why are you side-drafting in the first drafting practice we've got all week? I was actually backing out of the draft and trying to get out of it. I was in the wrong place at the wrong time.

"I'm real upset about that. You're not learning anything racing like that in practice."

Logano said the wreck was mainly the result of too many cars in a small space.

"We were coming off (Turn) four behind the 20 (Kenseth)," he said. "The 20 started making a move to go down the track. I had the run, so I was going to fill that hole. Then he started to come back up, and I was there.

"Maybe I shouldn't have been racing that hard in practice, but everybody was in a big pack. We were all trying to make things happen. When he came back up, I checked up a little, and the 21 (Bayne) hit me from behind, and we spun out. It's Daytona for you. We have another good car in the trailer."

The Swan Racing team of two rookies scrambled after the crash. Kligerman's car was wiped out in the crash, and the Toyota of teammate Cole Whitt was heavily damaged in an earlier wreck in the practice. Swan has just one backup car and is currently trying to get a second.

"We knew going in here with two young drivers it was going to be risky," team owner Brandon Davis said. "We're still trying to get ahead building cars, and this is going to put us behind, but that's racing, man. That's just the way it works. Sometimes you win; sometimes you lose."

"They slaved on that race car over the offseason," said Kilgerman, who is contending for Cup rookie of the year. "I had a quick race car in the draft. At that point, going into (Turn) 3, I was trying to back out of the draft. We were good, we were going to quit for the day. Probably just pack it up and wait for tonight.

"It's a shame. He's (Logano) supposed to be a veteran. You go up to the Sprint Cup Series and it's supposed to be the best of the best. You've got a guy in practice who's racing people like it's the end of the Daytona 500. Meanwhile, I came out of truck practice, and we we're running 3 or 4 wide no problem."